[PATCH] nvme: Boot as soon as the boot controller has been probed

Keith Busch kbusch at kernel.org
Wed Nov 11 14:19:20 EST 2020


On Sat, Nov 07, 2020 at 08:09:03PM -0800, Bart Van Assche wrote:
> The following two issues have been introduced by commit 1811977568e0
> ("nvme/pci: Use async_schedule for initial reset work"):
> - The boot process waits until all NVMe controllers have been probed
>   instead of only waiting until the boot controller has been probed.
>   This slows down the boot process.
> - Some of the controller probing work happens asynchronously without
>   the device core being aware of this.
> 
> Hence this patch that makes all probing work happen from nvme_probe()
> and that tells the device core to probe multiple NVMe controllers
> concurrently by setting PROBE_PREFER_ASYNCHRONOUS.

I am finding that this setting probes devices in parallel on boot up,
but serially for devices added after boot. That's making this a rather
unappealing patch.



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